Philips Avalon FM20, Instructions For Use Manual

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11 Monitoring Twin FHRs
115
Monitoring Twins Internally
FM30/50 Monitor one twin using the procedures described in the Chapter “Monitoring FHR and FMP Using
Ultrasound” on page 95. Monitor the second twin using the procedures described in the Chapter
“Monitoring FHR Using DECG” on page 137.
Example of a screen showing twin monitoring using a combination of US and DECG (The fetal heart
rate monitored via DECG is labeled "DFHR1"/"DFHR2"/"DFHR3" on the screen):
Cross-Channel Verification
If the monitored heart rates (from a fetal or maternal source) coincide at any time (that is, if the same
heart rate is being monitored by more than one transducer), this is detected via the monitor's cross-
channel verification feature, and appears on the screen and is repeatedly printed on the trace paper
after about 30 seconds. If the suspended coincidence persists for more than one minute without
interruption, then the INOP
COINCIDENCE will additionally appear on the screen. If you are
monitoring externally, check the trace and reposition one of the transducers, if necessary, to detect the
second FHR correctly.
FM30/50 If you are monitoring internally, check the trace and, if necessary, reposition the ultrasound transducer
to detect the second FHR correctly.
1 DFHR 1
2 Toco parameter
3 FHR 2